高中英语选择题

“It’s too early to conclude that the problem ____ but I think we have been moving in the right direction,” the manager said

A．had been solved	B．had solved
C．has been solved	D．has solved

I haven't finished my composition. I ____ for two hours and a half.

A．have written it

B．have been writing it

C．wrote it

D．am writing it

Mr. Black       Shanghai in a few days. Do you know when the earliest plane      on Sunday?

A．leaves; takes off

B．is leaving; takes off

C．is leaving; is taking off

D．leaves; is taking off